Detection approach
The User-Agent header sent during the normal HTTP Beacon request contradicts the User-Agent header sent during the out-of-band Netprobe HTTPS request, indicating inconsistent browser profiles or proxy rotation.
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Privacy-conscious browser extensions dynamically modifying User-Agent strings mid-session.
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